[Structural organization and connections of cell ensembles of the olfactory bulb of the cat brain].

The cat cerebral olfactory tubercle (OT) includes into its composition certain cellular ensembles distinguished by means of morphological criteria. The ensembles consist of three cellular components: clusters of granular neurons (islands of Calleja), pyramid-like neurons of the layer II, situating along the periphery of the islands, and groupings made by polygonal and spindle-like neurons of the layer III. Morphometrical analysis of every of the three cellular complex components has been carried out. About 7-10 islands of Calleja are situated on the OT territory, which makes nearly 75% of the whole surface of the OT. Neuronal composition of the cellular ensembles has been studied by Golgi method. Varieties of long and short axonal neurons, included into the ensemble composition, have been characterized. Presence of projections of the macrocellular neurons of the layer III (a part of the third component of the ensemble) has been revealed in the posterior part of the lateral hypothalamus and in the field of Forel H1. Possible role of the cellular ensembles is discussed for ensuring various functions of the OT.